/usr/share/zenlisp/depth.l is in zenlisp 2013.11.22-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ; zenlisp example program
; By Nils M Holm, 1998-2007
; See the file LICENSE for conditions of use.
; Compute the depth of a list. The depth
; of a list is the maximum number of
; lists enclosing any atom of the list.
;
; (depth '(a b (c (d) e) ((f)))) => '#3
(require '~nmath)
(define (depth a)
(cond ((atom a) '#0)
(t (+ '#1 (apply max (map depth a))))))
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